新制备了几种2 H -1,4-苯并恶嗪-3-硫酮。UV,IR和NMR研究表明,这些潜在的互变异构化合物中主要的互变异构体是硫内酰胺形式。甲基化产生S-Me而不是N-Me衍生物。NMR光谱可用于区分异构的苯并恶嗪结构之间以及杂环中的环外和环内双键。已经使用水合肼,吗啉,环己胺和苯胺对2 H -1,4-苯并恶嗪-3-硫酮及其S-Me和N-Me衍生物进行了亲核取代反应。在每种情况下,都已使用NMR确定反应产物的结构。
Studies on the chemistry of<i>O,N</i>- and<i>S,N</i>-containing heterocycles. 16. Investigations on the synthesis of new tricyclic β-lactams<i>via</i>[2+2]cycloaddition reaction
作者:Susanne Pippich、Herbert Bartsch、Thomas Erker
DOI:10.1002/jhet.5570340319
日期:1997.5
Starting from methylthioimidates 1–8 a series of corresponding tricyclic β-lactams was synthesized via [2+2]cycloaddition with ketenes generated in situ from substituted acetyl chlorides. Dependent on the bicyclic starting material and on the substituent of the corresponding acetyl chloride N-acetyl derivatives were obtained as by- or sole products.
Shridhar, D. R.; Jogibhukta, M.; Joshi, P. P, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1981, vol. 20, # 6, p. 474 - 476
作者:Shridhar, D. R.、Jogibhukta, M.、Joshi, P. P、Vishwakarma, L. C.、Narayan, G. K. A. S. S.、et al.
DOI:——
日期:——
Reddy Sastry; Ram; Jogibhukta, Indian Journal of Chemistry - Section B Organic and Medicinal Chemistry, 1989, vol. 28, # 1, p. 52 - 55